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8cdea7c0 BS |
1 | /* memcontrol.h - Memory Controller |
2 | * | |
3 | * Copyright IBM Corporation, 2007 | |
4 | * Author Balbir Singh <balbir@linux.vnet.ibm.com> | |
5 | * | |
78fb7466 PE |
6 | * Copyright 2007 OpenVZ SWsoft Inc |
7 | * Author: Pavel Emelianov <xemul@openvz.org> | |
8 | * | |
8cdea7c0 BS |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | */ | |
19 | ||
20 | #ifndef _LINUX_MEMCONTROL_H | |
21 | #define _LINUX_MEMCONTROL_H | |
f8d66542 | 22 | #include <linux/cgroup.h> |
456f998e YH |
23 | #include <linux/vm_event_item.h> |
24 | ||
78fb7466 PE |
25 | struct mem_cgroup; |
26 | struct page_cgroup; | |
8697d331 BS |
27 | struct page; |
28 | struct mm_struct; | |
78fb7466 | 29 | |
2a7106f2 GT |
30 | /* Stats that can be updated by kernel. */ |
31 | enum mem_cgroup_page_stat_item { | |
32 | MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */ | |
33 | }; | |
34 | ||
8b25c6d2 JW |
35 | extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, |
36 | struct list_head *dst, | |
37 | unsigned long *scanned, int order, | |
38 | int mode, struct zone *z, | |
39 | struct mem_cgroup *mem_cont, | |
40 | int active, int file); | |
41 | ||
82f9d486 KH |
42 | struct memcg_scanrecord { |
43 | struct mem_cgroup *mem; /* scanend memory cgroup */ | |
44 | struct mem_cgroup *root; /* scan target hierarchy root */ | |
45 | int context; /* scanning context (see memcontrol.c) */ | |
46 | unsigned long nr_scanned[2]; /* the number of scanned pages */ | |
47 | unsigned long nr_rotated[2]; /* the number of rotated pages */ | |
48 | unsigned long nr_freed[2]; /* the number of freed pages */ | |
49 | unsigned long elapsed; /* nsec of time elapsed while scanning */ | |
50 | }; | |
51 | ||
00f0b825 | 52 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
2c26fdd7 KH |
53 | /* |
54 | * All "charge" functions with gfp_mask should use GFP_KERNEL or | |
55 | * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't | |
56 | * alloc memory but reclaims memory from all available zones. So, "where I want | |
57 | * memory from" bits of gfp_mask has no meaning. So any bits of that field is | |
58 | * available but adding a rule is better. charge functions' gfp_mask should | |
59 | * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous | |
60 | * codes. | |
61 | * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.) | |
62 | */ | |
78fb7466 | 63 | |
7a81b88c | 64 | extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm, |
e1a1cd59 | 65 | gfp_t gfp_mask); |
7a81b88c | 66 | /* for swap handling */ |
8c7c6e34 KH |
67 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
68 | struct page *page, gfp_t mask, struct mem_cgroup **ptr); | |
7a81b88c KH |
69 | extern void mem_cgroup_commit_charge_swapin(struct page *page, |
70 | struct mem_cgroup *ptr); | |
71 | extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr); | |
72 | ||
8289546e HD |
73 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
74 | gfp_t gfp_mask); | |
08e552c6 KH |
75 | extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru); |
76 | extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru); | |
3f58a829 | 77 | extern void mem_cgroup_rotate_reclaimable_page(struct page *page); |
08e552c6 KH |
78 | extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru); |
79 | extern void mem_cgroup_del_lru(struct page *page); | |
80 | extern void mem_cgroup_move_lists(struct page *page, | |
81 | enum lru_list from, enum lru_list to); | |
569b846d KH |
82 | |
83 | /* For coalescing uncharge for reducing memcg' overhead*/ | |
84 | extern void mem_cgroup_uncharge_start(void); | |
85 | extern void mem_cgroup_uncharge_end(void); | |
86 | ||
3c541e14 | 87 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 88 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
c9b0ed51 | 89 | |
c7ba5c9e | 90 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); |
4c4a2214 | 91 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); |
3062fc67 | 92 | |
e42d9d5d | 93 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 | 94 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
a433658c | 95 | extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm); |
cf475ad2 | 96 | |
2e4d4091 LJ |
97 | static inline |
98 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
99 | { | |
100 | struct mem_cgroup *mem; | |
101 | rcu_read_lock(); | |
e638c139 | 102 | mem = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
2e4d4091 LJ |
103 | rcu_read_unlock(); |
104 | return cgroup == mem; | |
105 | } | |
8a9f3ccd | 106 | |
d324236b WF |
107 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem); |
108 | ||
e8589cc1 | 109 | extern int |
ac39cf8c | 110 | mem_cgroup_prepare_migration(struct page *page, |
ef6a3c63 | 111 | struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask); |
01b1ae63 | 112 | extern void mem_cgroup_end_migration(struct mem_cgroup *mem, |
50de1dd9 | 113 | struct page *oldpage, struct page *newpage, bool migration_ok); |
ae41be37 | 114 | |
58ae83db KH |
115 | /* |
116 | * For memory reclaim. | |
117 | */ | |
c772be93 | 118 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); |
56e49d21 | 119 | int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg); |
889976db | 120 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
1bac180b | 121 | unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, |
bb2a0de9 | 122 | int nid, int zid, unsigned int lrumask); |
3e2f41f1 KM |
123 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
124 | struct zone *zone); | |
125 | struct zone_reclaim_stat* | |
126 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
127 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
128 | struct task_struct *p); | |
58ae83db | 129 | |
82f9d486 KH |
130 | extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem, |
131 | gfp_t gfp_mask, bool noswap, | |
132 | struct memcg_scanrecord *rec); | |
133 | extern unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem, | |
134 | gfp_t gfp_mask, bool noswap, | |
135 | struct zone *zone, | |
136 | struct memcg_scanrecord *rec, | |
137 | unsigned long *nr_scanned); | |
138 | ||
c077719b KH |
139 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
140 | extern int do_swap_account; | |
141 | #endif | |
f8d66542 HT |
142 | |
143 | static inline bool mem_cgroup_disabled(void) | |
144 | { | |
145 | if (mem_cgroup_subsys.disabled) | |
146 | return true; | |
147 | return false; | |
148 | } | |
149 | ||
2a7106f2 GT |
150 | void mem_cgroup_update_page_stat(struct page *page, |
151 | enum mem_cgroup_page_stat_item idx, | |
152 | int val); | |
153 | ||
154 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
155 | enum mem_cgroup_page_stat_item idx) | |
156 | { | |
157 | mem_cgroup_update_page_stat(page, idx, 1); | |
158 | } | |
159 | ||
160 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
161 | enum mem_cgroup_page_stat_item idx) | |
162 | { | |
163 | mem_cgroup_update_page_stat(page, idx, -1); | |
164 | } | |
165 | ||
4e416953 | 166 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
0ae5e89c YH |
167 | gfp_t gfp_mask, |
168 | unsigned long *total_scanned); | |
a63d83f4 DR |
169 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem); |
170 | ||
456f998e | 171 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
ca3e0214 KH |
172 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
173 | void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail); | |
174 | #endif | |
175 | ||
f212ad7c DN |
176 | #ifdef CONFIG_DEBUG_VM |
177 | bool mem_cgroup_bad_page_check(struct page *page); | |
178 | void mem_cgroup_print_bad_page(struct page *page); | |
179 | #endif | |
52d4b9ac | 180 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
181 | struct mem_cgroup; |
182 | ||
183 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 184 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
185 | { |
186 | return 0; | |
187 | } | |
188 | ||
8289546e HD |
189 | static inline int mem_cgroup_cache_charge(struct page *page, |
190 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 191 | { |
8289546e | 192 | return 0; |
8a9f3ccd BS |
193 | } |
194 | ||
8c7c6e34 KH |
195 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
196 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
197 | { |
198 | return 0; | |
199 | } | |
200 | ||
201 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
202 | struct mem_cgroup *ptr) | |
203 | { | |
204 | } | |
205 | ||
206 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
207 | { | |
208 | } | |
209 | ||
569b846d KH |
210 | static inline void mem_cgroup_uncharge_start(void) |
211 | { | |
212 | } | |
213 | ||
214 | static inline void mem_cgroup_uncharge_end(void) | |
215 | { | |
216 | } | |
217 | ||
8a9f3ccd BS |
218 | static inline void mem_cgroup_uncharge_page(struct page *page) |
219 | { | |
220 | } | |
221 | ||
69029cd5 KH |
222 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
223 | { | |
224 | } | |
225 | ||
08e552c6 KH |
226 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
227 | { | |
228 | } | |
229 | ||
230 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
231 | { | |
232 | return ; | |
233 | } | |
234 | ||
67954fe9 | 235 | static inline void mem_cgroup_rotate_reclaimable_page(struct page *page) |
3f58a829 MK |
236 | { |
237 | return ; | |
238 | } | |
239 | ||
08e552c6 KH |
240 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) |
241 | { | |
242 | return ; | |
243 | } | |
244 | ||
245 | static inline void mem_cgroup_del_lru(struct page *page) | |
246 | { | |
247 | return ; | |
248 | } | |
249 | ||
250 | static inline void | |
251 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
252 | { |
253 | } | |
254 | ||
e42d9d5d WF |
255 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
256 | { | |
257 | return NULL; | |
258 | } | |
259 | ||
a433658c KM |
260 | static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm) |
261 | { | |
262 | return NULL; | |
263 | } | |
264 | ||
bd845e38 | 265 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
bed7161a | 266 | { |
60c12b12 | 267 | return 1; |
bed7161a BS |
268 | } |
269 | ||
4c4a2214 DR |
270 | static inline int task_in_mem_cgroup(struct task_struct *task, |
271 | const struct mem_cgroup *mem) | |
272 | { | |
273 | return 1; | |
274 | } | |
275 | ||
d324236b WF |
276 | static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) |
277 | { | |
278 | return NULL; | |
279 | } | |
280 | ||
e8589cc1 | 281 | static inline int |
ac39cf8c | 282 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
ef6a3c63 | 283 | struct mem_cgroup **ptr, gfp_t gfp_mask) |
ae41be37 KH |
284 | { |
285 | return 0; | |
286 | } | |
287 | ||
01b1ae63 | 288 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
50de1dd9 | 289 | struct page *oldpage, struct page *newpage, bool migration_ok) |
ae41be37 KH |
290 | { |
291 | } | |
292 | ||
6c48a1d0 KH |
293 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
294 | { | |
295 | return 0; | |
296 | } | |
297 | ||
298 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
299 | int priority) | |
300 | { | |
301 | } | |
302 | ||
303 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
304 | int priority) | |
305 | { | |
306 | } | |
307 | ||
f8d66542 HT |
308 | static inline bool mem_cgroup_disabled(void) |
309 | { | |
310 | return true; | |
311 | } | |
a636b327 | 312 | |
14797e23 | 313 | static inline int |
c772be93 | 314 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
14797e23 KM |
315 | { |
316 | return 1; | |
317 | } | |
318 | ||
56e49d21 RR |
319 | static inline int |
320 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg) | |
321 | { | |
322 | return 1; | |
323 | } | |
324 | ||
a3d8e054 | 325 | static inline unsigned long |
bb2a0de9 KH |
326 | mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid, |
327 | unsigned int lru_mask) | |
a3d8e054 KM |
328 | { |
329 | return 0; | |
330 | } | |
331 | ||
332 | ||
3e2f41f1 KM |
333 | static inline struct zone_reclaim_stat* |
334 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
335 | { | |
336 | return NULL; | |
337 | } | |
338 | ||
339 | static inline struct zone_reclaim_stat* | |
340 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
341 | { | |
342 | return NULL; | |
343 | } | |
344 | ||
e222432b BS |
345 | static inline void |
346 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
347 | { | |
348 | } | |
349 | ||
2a7106f2 GT |
350 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
351 | enum mem_cgroup_page_stat_item idx) | |
352 | { | |
353 | } | |
354 | ||
355 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
356 | enum mem_cgroup_page_stat_item idx) | |
d69b042f BS |
357 | { |
358 | } | |
359 | ||
4e416953 BS |
360 | static inline |
361 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
0ae5e89c YH |
362 | gfp_t gfp_mask, |
363 | unsigned long *total_scanned) | |
4e416953 BS |
364 | { |
365 | return 0; | |
366 | } | |
367 | ||
a63d83f4 DR |
368 | static inline |
369 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem) | |
370 | { | |
371 | return 0; | |
372 | } | |
373 | ||
ca3e0214 KH |
374 | static inline void mem_cgroup_split_huge_fixup(struct page *head, |
375 | struct page *tail) | |
376 | { | |
377 | } | |
378 | ||
456f998e YH |
379 | static inline |
380 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
381 | { | |
382 | } | |
78fb7466 PE |
383 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
384 | ||
f212ad7c DN |
385 | #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM) |
386 | static inline bool | |
387 | mem_cgroup_bad_page_check(struct page *page) | |
388 | { | |
389 | return false; | |
390 | } | |
391 | ||
392 | static inline void | |
393 | mem_cgroup_print_bad_page(struct page *page) | |
394 | { | |
395 | } | |
396 | #endif | |
397 | ||
8cdea7c0 BS |
398 | #endif /* _LINUX_MEMCONTROL_H */ |
399 |